9881669 has 4 divisors (see below), whose sum is σ = 11293344. Its totient is φ = 8469996.

The previous prime is 9881647. The next prime is 9881671. The reversal of 9881669 is 9661889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9881669 - 2⁸ = 9881413 is a prime.

It is a super-2 number, since 2×9881669² = 195294764451122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9881639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705827 + ... + 705840.

It is an arithmetic number, because the mean of its divisors is an integer number (2823336).

Almost surely, 2^9881669 is an apocalyptic number.

It is an amenable number.

9881669 is a deficient number, since it is larger than the sum of its proper divisors (1411675).

9881669 is a wasteful number, since it uses less digits than its factorization.

9881669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411674.

The product of its digits is 186624, while the sum is 47.

The square root of 9881669 is about 3143.5122077065. The cubic root of 9881669 is about 214.5903068795.

The spelling of 9881669 in words is "nine million, eight hundred eighty-one thousand, six hundred sixty-nine".